 @classDec
 class DecClass{
    @methodDec('m')
    foo(){

    }
 }

 function classDec(){
    return target=>{
        console.log('class',target,c)
    }
 }

 function methodDec(m){
    return (target,name)=>{
        console.log('method',target,name,m);
    }
 }

//  const c = new DecClass();